#include <pngchunk_int.hpp>
Public Types | |
enum | TxtChunkType { tEXt_Chunk = 0, zTXt_Chunk = 1, iTXt_Chunk = 2 } |
Text Chunk types. | |
enum | MetadataType { exif_Data = 0, iptc_Data = 1, xmp_Data = 2, comment_Data = 3 } |
Metadata Chunk types. | |
Static Public Member Functions | |
static void | decodeIHDRChunk (const DataBuf &data, int *outWidth, int *outHeight) |
Decode PNG IHDR chunk data from a data buffer data and return image size to outWidth and outHeight. | |
static void | decodeTXTChunk (Image *pImage, const DataBuf &data, TxtChunkType type) |
Decode PNG tEXt, zTXt, or iTXt chunk data from pImage passed by data buffer data and extract Comment, Exif, Iptc, Xmp metadata accordingly. | |
static DataBuf | keyTXTChunk (const DataBuf &data, bool stripHeader=false) |
Return PNG TXT chunk key as data buffer. | |
static DataBuf | makeMetadataChunk (const DataBuf &metadata, MetadataType type, bool compress) |
Return a complete PNG chunk data compressed or not as buffer. Data returned is formated accordingly with metadata type to host passed by metadata. |
void Exiv2::Internal::PngChunk::decodeIHDRChunk | ( | const DataBuf & | data, | |
int * | outWidth, | |||
int * | outHeight | |||
) | [static] |
Decode PNG IHDR chunk data from a data buffer data and return image size to outWidth and outHeight.
data | PNG Chunk data buffer. | |
outWidth | Integer pointer to be set to the width of the image. | |
outHeight | Integer pointer to be set to the height of the image. |
References Exiv2::getLong(), and Exiv2::DataBuf::pData_.
Referenced by Exiv2::PngImage::readMetadata().
void Exiv2::Internal::PngChunk::decodeTXTChunk | ( | Image * | pImage, | |
const DataBuf & | data, | |||
TxtChunkType | type | |||
) | [static] |
Decode PNG tEXt, zTXt, or iTXt chunk data from pImage passed by data buffer data and extract Comment, Exif, Iptc, Xmp metadata accordingly.
pImage | Pointer to the image to hold the metadata | |
data | PNG Chunk data buffer. | |
type | PNG Chunk TXT type. |
References keyTXTChunk(), Exiv2::DataBuf::pData_, Exiv2::DataBuf::size_, and Exiv2::string.
Referenced by Exiv2::PngImage::readMetadata().
DataBuf Exiv2::Internal::PngChunk::keyTXTChunk | ( | const DataBuf & | data, | |
bool | stripHeader = false | |||
) | [static] |
Return PNG TXT chunk key as data buffer.
data | PNG Chunk data buffer. | |
stripHeader | Set true if chunk data start with header bytes, else false (default). |
References Exiv2::DataBuf::pData_, and Exiv2::DataBuf::size_.
Referenced by decodeTXTChunk().
DataBuf Exiv2::Internal::PngChunk::makeMetadataChunk | ( | const DataBuf & | metadata, | |
MetadataType | type, | |||
bool | compress | |||
) | [static] |
Return a complete PNG chunk data compressed or not as buffer. Data returned is formated accordingly with metadata type to host passed by metadata.
metadata | metadata buffer. | |
type | metadata type. | |
compress | compress or not metadata. |
References Exiv2::DataBuf::pData_, and Exiv2::DataBuf::size_.